Annie and her parents, Harry and Debbie, are surprised to learn that West Beverly's theater director can no longer oversee the school musical. Tabitha offers to direct the musical play, but her eccentric and demanding attitude does not sit well with Annie or the other actresses. Kelly persuades Brenda to take over as the play's director, much to Tabitha's chagrin. But Kelly and Brenda end up continuing to argue over Kelly's continuing involvement with Ryan and taking up time with Kelly's son, Sammy. Meanwhile, Dixon tries to get a part time job at the Peach Pit coffee shop to get money to pay off a bully after Dixon accidentally dents the bully's car. Naomi becomes more distraught over her parents, Tracy and Charlie's, open-marriage arrangement, and she eventually confronts her father's mistress to show her true anger towards her. Elsewhere, Annie's growing relationship with Ty is the talk of the school, which leads to Ethan, who's growing more uncomfortable and jealous, to try to get her attention.

As opening night for the school play nears, Harry catches Annie kissing Ty, which makes him worry that she and Ty are moving too fast with their growing romance. Silver, stressed out from her job as the stage manager, gets some comfort from Dixon. Meanwhile, Naomi tries make her mother and father get back together, but Tracy's mind to divorce Charlie is made up. On the opening night of the play, the star Adrianna's drug use comes to surface from being under constant pressure from her overbearing mother, Constance, and when Brenda discovers this, she replaces Adrianna with Annie in the lead alongside Ty. But when both Brenda and Kelly confide in Constance about her daughter's drug abuse, Constance (a secret drug abuser-in-denial herself) refuses to believe them. Afterwards, Adrianna successfully gets her revenge when she manipulates and breaks up Ty and Annie's romantic get-together at a celebration party at a local hotel.

Adrianna and her evil-witch-mother, Constance, plot a cruel revenge against Annie and the rest of the faculty at West Beverly whom they think cheated Adrianna out of her role in the school play. Debbie's boss, Antonio, offers her a job to shoot a fashion show for Nylon Magazine during Fashion Week, where Annie uses the opportunity to her advantage for a class assignment, while her father advices her to try to make amends meet with Adrianna in order to try to catch her in the act with her substance abuse. Naomi believes the upcoming fashion show could help her parents' marital problems and she plans with Ethan to try to break up her father and mistress and have her mother, Tracy, meet with Charles, but it only makes matters worse. Ty and Annie's relationship is put to the test because of Adrianna's meddling. But when Adrianna lets her guard down and reveals to Annie that she lied about hooking up with Ty to break them up, it results in Annie declaring war. Silver is pursued by Debbie's sleazy client, Tony, to work in modeling, while a jealous Dixon becomes aware about what's going on, while Navid feels like he's the 'third wheel' to Dixon and Silver's growing romance. Meanwhile, Kelly receives a phone call from Sammy's father that could change her relationship with Ryan when she's offered to move to Wyoming to join Dylan, while Brenda, with her work at West Beverly finished, plans to return to New York.

As Silver's "half birthday" approaches, she decides to spend a spooky evening by watching horror movies with her friends at the famous Hollywood Forever Cemetery. But Dixon is not eager to attend when he reveals to her that he does not watch horror films. Meanwhile, Harry's past returns to haunt him when Tracy reveals she is searching for their long-lost illegitimate son. Annie and Ethan are paired up for an assignment, which leads to a possible romantic connection after the two take care of a baby. A mysterious new student, named Kimberly MacIntyre, arrives at West Beverly which considers with a police raid on the school searching for narcotics which leads Naomi to cover for Adrianna when Naomi takes the fall by taking her cocaine stash. After Naomi confronts Adrianna over her escalating drug addiction, she agrees to come forward to clear Naomi, but Adrianna soon goes back on her word when she lands another acting role which could jump-start her acting career and make her difficult-to-please mother proud. Also, Ryan seeks to explore his horizons since his breakup with Kelly by dating an attractive, but dim-witted actress.

After spending several days in the hospital recovering from a near-fatal drug overdose, Adrianna tries to make amends with Naomi. But Naomi refuses to forgive Adrianna for her betrayal. While serving her detention, Naomi meets a trouble-making punk, named Ozzie, who could spell trouble for her. Later, Adrianna makes a connection with Navid, who helps her through her situation as she's accepted into a rehab clinic. Meanwhile, Annie and Ethan finally take their rapidly growing romance to a new level during the school's annual homecoming dance, causing Naomi to feel jealous. Dixon asks Silver to the dance, but she turns him down for she feels, in her liberal and radical mind, that Homcomming is the scene of the morally corrupt. Ryan believes that the new student, Kimberly, is a narc after he sees her purchasing drugs. Also, Debbie confronts Tracy about the time Tracy kissed Harry.

Christina invites Dixon and Navid and the rest of the students to a house party where the band Carolina Liar will perform and Navid moves on from his relationship with Adrianna by connecting with a fellow Iranian girl named Nika. Meanwhile, Ethan gets involved in a traffic accident with a girl named Rhonda Kimble, a student at West Beverly whom he feels guilty about not knowing her since she's a long-time student. Adrianna and Naomi try to debate about how to tell both her mother Constance, as well as Ty, about Adrianna's pregnancy. While Ty takes the news very calmly, Adrianna fears a violent reaction from her selfish mother whom relies and takes advantage of Adrianna's acting career. But Adrianna finds out that Ty's parents want to bribe her to get an abortion and keep the news a secret. Eventually, Adrianna broadcasts a video announcement of her pregnancy to the entire school.

Navid and Adrianna fantasize about their future, but when they tell his parents about their decision to spend the rest of their lives together, things don't go as they planned when both Mr. and Mrs. Shirazi threaten to sever all ties to their son. Meanwhile, Silver tries to adjust to her new Catholic girls school, but soon learns that it is not all it's cracked up to be when her new school mate, Angela, gives her some advice to be honest about her past. Silver goes along with it... and later regrets it. While Dixon feels left out of Silver's life, Annie and the rest of the Wilsons are dealing with having Naomi as their new house guest. Naomi convinces Annie to go on a double date with Liam's friend, but Annie is shocked at the way the evening ends when Liam propositions to her. Later, Naomi's older sister Jen, who's just as brash and amoral as she, arrives in town for a visit. Naomi has no idea just how devious her sister is... and of her connections to Ryan as well as Ethan.

Dixon and Sasha continue their whirlwind romance despite his friends advice that he's moving too fast with it. That weekend, Dixon and Sasha drive up to Napa's Wind Country to sample some wine. But on the return trip, a flat tire leads to the discovery of a car trunk full of pornography, and a series of lies that Dixon makes up. Annie's new confident attitude quickly disappears when she realizes that Jasper, a new student at West Beverly, is nephew of the derelict that she hit on prom night. Navid assigns Silver and Gia to interview Jasper for a news piece about his uncle whom was a student at West Beverly, and who left behind a $100,000 inheritance to the school. Annie tries to befriend Jasper who confides in her about how his uncle lost everything, ending up homeless, and of Jasper's uncertainty with it all. Elsewhere, Navid continues to grow insanely and immaturely jealous over Adrianna's friendship with Teddy, with whom she confides about her uncertainty with Navid and of his envy. Elsewhere, Liam finally finds a way to get revenge on the psychopath Jen to make her reveal the truth to Naomi about her seducing him that night of the prom party when he discovers that Jen scammed a fortune out of a French husband that she married for money. But Jen has other ideas to slither out of the predicament she's in.

Naomi, Adrianna, Silver and Annie decide to have a girls' weekend and head to a yoga retreat in Ojai. Annie attempts to be a good cousin and invites Emily along for the weekend but confronts her about being a downer on the trip. Emily purposefully neglects to wake Annie up for a sweat lodge session and uses the opportunity to turn the girls against Annie. Naomi, who originally thinks the retreat is silly, suddenly decides to extend her stay. Silver runs into Navid, and the two have a secret rendezvous. Adrianna returns from the retreat and calls a tabloid to sell an exclusive story. Meanwhile, Debbie plans a romantic dinner for Ryan, but they are interrupted by Dixon, forcing Ryan to quickly find a place to hide.